How is colorectal cancer treated? The American Cancer Society website. Available at:
http://www.cancer.org/docroot/CRI/content/CRI%5F2%5F8%5FMaking%5FTreatment%5FDecisions%5FColon%5Fand%5FRectum%5FCancer.asp?sitearea=. Updated January 31, 2014. Accessed September 12, 2014.

Surgery for colorectal cancer. The American Cancer Society website. Available at:
http://www.cancer.org/cancer/colonandrectumcancer/overviewguide/colorectal-cancer-overview-treating-surgery. Updated January 31, 2014. Accessed September 12, 2014.